Construcción de un sistema de control de nivel biestable y medición de caudal

Abstract

A level control and flow measurement system was designed and built with a programmable logic controller (PLC) and a digital output module. The system consists of two tanks connected to each other by pipes, a control tank in which the physical level and flow variables are commanded and a second reserve tank from which the liquid is supplied. To perform the liquid level control the system has all or nothing solenoid valves, sensors and maneuvering instruments, it also has two peripheral pumps installed that are responsible for transferring the liquid to the control tank where it will be monitored through of an ultrasonic sensor placed in the upper part of the tank, the return of the liquid to the reserve tank is carried out by the same pump and with the help of the solenoid valves, thus forming a closed hydraulic circuit. For the flow measurement the system has a flow meter installed in the pipeline that goes from the reserve tank to the control tank, in addition to a manual gate valve that regulates the flow rate in the pipeline.